Mechanical drive mechanism



W. S. EDMANDS.

MECHANICAL DRIVE MECHANISM.

APPLICATION FILED IIIAY27. I92I.

Patented Oct. 24, 1922.

M ITI/S- April`2,` 1921, Serial No. 457,880.

Patented Oct. 24, 1922.

PATENT OFFICE.

WALTER S. EDMANDS, OF BOSTON, MASSACHUSETTS.

MECHANICAL DRrvE MECHANISM.

Application led Hay 27,

To all whom it ymay concern.'

Be it known that I, WALTER S. EDMANDS, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented a certaink lnew and useful Improvement in Mechanical. Drive Mechanisms, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to an improvement in mechanical drive mechanisms. It is especially intended for application to transmitting movement from a motor to a work shaft. It is more especially intended for application to a power-driven ice cream freezer in combination with a cabinet having a cover, and means whereby when the cover vis closed it will automatically start the freezer and when the cover is opened it will automatically stop the operation of they freezer, and is an improvement on the device shown in my prior application filled he drawings show the invention as embodied in an ice cream freezer, but I wish it understood that the claims wherever possible are not to be limited to an ice cream freezer.

The invention will be fully understood from the following description when taken in connection with the accompanying drawings, and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Fig. 1 is a side elevation of a freezer embodying the invent-ion showing the cover closed and the parts in operative position for driving the paddle shaft of the freezer.

Fig. 2 is a front elevation partly broken away of the parts shown in Figure 1.

' Fig. 3 is a side elevation showing the cover turned up on its hinge, the hinged top of the cabinet being closed.

Referring now to the drawings, l is the tub of an ice cream freezer. which is mounted in a cabinet case 2 having a base 3 and legs 4. The freezer and case are provided with guides to maintain the freezer tub 1 in proper location in the case. Any suitable guides may be provided. As shown in the drawings, one side of the freezer tub is provided with angle irons 6 secured to the sides thereof, y each angle iron having a downwardly extending pin 7 which engages a Vhole in the flange 8 of an annular angle ironv secured to the inner periphery ofthe 1921. Serial No. 473,072.

case 2. rAny suitable guide, however, may

ybe employed, they guide not being a part of on the side of the case opposite the hinge to hold the top in closed position.

The paddle shaft 16 of the freezer has suitable gear connection with a crank shaft 15 for rotating the paddle shaft. Said gear connection as shown consists of a bevel gear 18 on the paddle shaft which meshes with a bevel gear 19 on the crank shaft 15. The crank shaft 15 is journalled in suitable bearings 50 having a crank arm 51. Secured to the under side of the hinged top member 11 of the tub is a bracket 52 in which is supported a stud shaft 53 on which is journalled a gear wheel 20. Said gear wheel carriesI a pin 54 projecting from one face thereof in position so thatit is adapted to engage the crank arm 51 when said gear wheel 2O is rotated, thereby actuating the crank to rotate the shafty 15 and thus, through the intermediate mechanism, to rotate the paddle shaft 16.

When the top member 11 is in closed position, as shown in Figures 1 and 2, the gear wheel 20 is in position for the said. pin 54 to thus actuate the crank. When the top member 11 is turned back on its hinge, as shown in Figure 3, said gear wheel 20 is in position so that the pin 54 will not engage the crank arm 51 and therefore the crank will not be operated. Any suitable mechanism may be provided for actuating the gear wheel 20. The preferred mechanism is an electricv motor shownv at 22, having a shaft .23 provided with apinion 24 which meshes with the gear 20 mounted on the stud shaft Said motor being mounted on the hinged member 11 together with the gear wheel 20, the said pinion 24 and gear 20, will always be in mesh with each other whether the hinged member 11 is turned up as shown in Figure 3 or whether it is turned down into closed position, as shown in Figures 1 and 2.

Said motor shaft 23 is driven in the wellknown manner of an electric motor. As shown vin the drawings, the current of the ewiteb within a bei. 30 monntedtaet on the hin d top il. rlhe wire 29 leads to the oon-- teetimeinber Si within said boi;7 and the wire 'ie of ineeted with the bindingv poetl in Vith which ie Connected an armature ,3 Carrying; a Contact member 34.,

`ver 35 ie hinged et 86 to the hinged top il. eaid @over he, Ting` `preferably en arched top, ae shown, and et parallel Sides 'feonred to the inside of the ease 2 within the ton ie strike member 389 which is Shown a.. ein@` in the 'form of an angle iron oh when the top il ie Closed is 'enby the lower endinc the Contact mem- Y l, and the el ring;- yields to allow the Contact member Sli to be iorood np into `entg gement with the Contact member 313 thus Closing; the oirenit and Starting` the motor.

lWhen the said hinged top 11 ie thrown ogen7 the Spring opens the Contact anton'iatieelly and Stops the motor.

The oever 35 ie preferably provided with Spring' Catches 39 which engage with projeetiene 4t@ on the ease to hold the cover closed, but the spring Catches will yield readily to be dieen fred trom the said projections 4e() whenever it is desired to tnrn the Cover bach on its hinge. The hinged top il is provided with 'a handle. il tor convenience in turning` it bach on ite hinge to open it7 end in. so doing' it will also o'arry back with it t1 cover 35. t desired the Cover 35 can be turned ba'el independently oit thehingged top 11.

ln order to conveniently hold the Cover 35 end top il in their open position, there is provided a editable brace; The form of brace Shown in the drawings consists of a jointed brace 4:9-, one end oit said jointed brace being` pivoted to the strike member 38 sind the other end being pivoted tothe Side of the hinged top 11. T he lSaid jointed brace 4t2 rwilli donbie up in jack-knife fash- 'io`n as shown in Figure l, when the top is Closed. i Y

.de previously statedj any Snitablemotor may be employed to drive the gear wheel 20, the electric motor already described being eimply one suitable i'iorm of motor for that piirpoee; Also in the construction shown, the motor is" automatically stopped when the hinged top is open. So 'tar as the present invention is concerned, however, a motor niio'ln'; be empioyed which is continuons in opeiotion even when the hinged member is turned bach into the' positionehown inFignre 3. is soon as thev hinged top is turned back fio/"ae to raise the gearl 2O so that the pin 511 ie out of operative relation to the eaie orfani: arm 51, the Crank eheit andthereiore the paddle shaft 16 will stop their rotation whether the gear 2G ie etill rotating or not. soon es the Cover ie closed, bringing the 90 into operative relation to the pin 54 on the crank arm and the 20 rotates :ter enough tor the pin 54; to come into engagement with the eranly; erm, the Crank will be turned en d the paddle or etirrer shaft 16 will be rotated. The shaft 16 which has been re- Yterred to ae the paddle shaft ot an iee cream eener, typities any worli shaft which may bedriven by connection with :i motor in the i'nenner deeeribed and Whieh may be thrown ont of action by turning` baol; the hinged member which Carries the driving gear 20.

l. ln Combination with a work ehait,e Crank having driifiig eonneetion with eaid work shaft7 a freine having` a hinged 'topa 'a rotary drh/ing-` wheel, bearingje therefor mounted on seid hinged top, a motor mounted on seid hinged top having:1 driving; connection with seid ldrivingwheel, said driving-wheel having; connected therewith i member which when the said hinged top is closed engages the Said crank and netnates the wort:` shaft. end wljiich ie' thrown ont oit operative relation to the Crank when the top is turned up on its hinge.

In combination with awori ehei't, e orenlr having driving'eonneotion with Said worlr shaft, e treme having a hinged top,

e rotary vgear wheel, bearings therefor` mounted on said hinged top, a motor mounted on said hingedtophaving a shaft carrying a pinion which at all. times engages with seid geur wheel and rotates theeaine whenever the motor is in operation7 said gear wheelA having connected therewith a member ywhioh when the said hinged top ie' oloe'ed engages the said Crank and `eetnatee thework Shaft, and which ie thrown ont oi operative relation to the Crank when the top is turned np on its hinge.

3. it. power-driven Vice cream 'freezer having` e etirrer shafn'a crank having driving Connection with Said Stirrer shaft7 a oaee ttor the freezer having e hingedtop,` aA rotary driving; wheel Imonnted on eaidhinged top, and means for rotating seid drivingwheel, Said driving wheel having; Connected therewith a member' which when the seid hing/ed top closed engeges the seid crank erm and rotateethe Stirrer shaft., and which is thrown out of operativevreiationto the era-nk when the top'ie tnrned up on its hinge.l

4.l In Vcombination with aworh shatt,- a

crank having; drivingy Vconnection'with saidk work shaft, `a frame hevinga hinged top, a rotary gear wheel mounted on seid hinged top,l means torA rotating said lrear wheel, Said gear Wheel lhaving e 'projection lthereon whiehwhen the said hinged top is `closed engegessaid `crank and ectiietes the crank and work shaft, and which is thrown out of operative relation to the crank when the top is turned up on its hinge.

5. In combination with a work shaft, a crank having driving connection with said work shaft, a frame having a hinged top, a rotaryv gear Wheel mounted on said hinged top, a motor mounted on said hinged top having a rotary driving shaft, a pinion mounted on said shaft which engages with said gear Wheel, said gear wheel having a projection thereon which when the said hinged top is closed engages said crank and actuates the crank and work shaft, and which is thrown out of operative relation to the crank when the top is turned up on its hinge.

6. A power-driven ice cream freezel1 having a stirrer shaft, a crank having driving connection with said stirrershaft, a case for the stirrer having a hinged top, a rotary gear wheel, bearings for said gear wheel mounted on said hinged top, and a motor mounted on said hinged top having a pinion which engages at all times with said gear Wheel and rotates the same whenever the motor is in 7. A power-driven ice cream freezer having a stirrer shaft, a crank havin driving connection with said stirrer shait, a case for the freezer having a hinged top, a r0- tary driving wheel mounted on said hinged top, a motor mounted on said hinged top having at all times driving connection with said driving Wheel whether the hinged top is open or closed, said driving wheel having connected therewith a member which when the said hinged top is closed engages with said crank and actuates the stirrer shaft, and which is thrown out of operative relation to the crank when the top is turned up on its hinge.

In testimony whereof I aflix my signature.

WALTER S. EDMANDS. 

